>> weather not a factor and frequently you do get overcast weather and fog here at sfo, when that happens they close down a couple of runways that was the immediate speculation that weather played a factor. but that speculation was immediately put to rest when people said that it was a clear sunny day here, all four runways were operational, traffic going in and out, normally. so, weather we can take that off the table. so, really the question becomes, as i put it before, was this some kind of pilot error or was there a malfunction with the airplane. i think that is what we are looking at here. >> as dan noted that ntsb team due there in just about under two hours, hopefully we will get information from them at day break. of the 307 passengers and crews on board, more than half have been taken to the hospital, the most serious went to san francisco general, that is the city's only level 1 trauma center. the hospital set up tents outside the emergency room, and it was said that a spontaneous wave showed up to help, including doctors and workers and language translators let's go live, she i